Download Chia 1.2.0 or newer from https://github.com/Chia-Network/chia-blockchain/releases

Once ready, ensure your node and wallet are fully synced

Your wallet needs at least 1 Mojo to join a pool. Use https://faucet.chia.net/ if you don't have 0.000000000001 XCH (1 Mojo).

Go to Pool tab, click “Join a pool”

At Pool URL, fill in: https://xch.spacefarmers.io/ and leave fee blank

Check pool details, click create and wait for the pool wallet to be accepted (could take a minute or 2)

You can now create plots, be sure to select the created pool wallet when needed (step 5 in creating plots)